Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D759807 | Respirator mask exhalation port | William A. Mittelstadt, Carl W. Raines, III, Mark W. Schulz | 2016-06-21 |
| D757928 | Respirator cartridge body | Gary E. Dwyer, Pierre Legare, Mark W. Schulz | 2016-05-31 |
| D754844 | Respirator mask | Mark W. Schulz | 2016-04-26 |
| 9259058 | Personal protective equipment strap retaining devices | Thomas J. Brace, William A. Mittelstadt | 2016-02-16 |
| 9247788 | Personal protective equipment strap retaining devices | Thomas J. Brace, William A. Mittelstadt | 2016-02-02 |
| D747795 | Respirator mask body | Michael J. Cowell, Carl W. Raines, III, Mark W. Schulz, Charlie Wood | 2016-01-19 |
| D747470 | Respirator cartridge connector | — | 2016-01-12 |
| D746437 | Respirator mask having a communication grille | Gary E. Dwyer, Carl W. Raines, III, Mark W. Schulz | 2015-12-29 |
| D744088 | Respirator mask having a circular button | Kent E. Lageson, William A. Mittelstadt, Carl W. Raines, III, Charlie Wood | 2015-11-24 |
| D743536 | Respirator mask having a circular button | William A. Mittelstadt | 2015-11-17 |
| D742504 | Respirator mask | William A. Mittelstadt | 2015-11-03 |
| D741475 | Respirator mask having a communication grille | Mark W. Schulz, Charlie Wood | 2015-10-20 |
| 8899227 | Air filtration device having subsections lacking fluid communication | Britton G. Billingsley, Joy L. Manske | 2014-12-02 |
| 8887719 | Air filtration device having tuned air distribution system | Britton G. Billingsley, Joy L. Manske | 2014-11-18 |
| D710304 | Battery pack for powered air purifying respirator (PAPR) | Nathan A. Abel | 2014-08-05 |
| D696629 | Large battery pack for powered air purifying respirator (PAPR) | Nathan A. Abel | 2013-12-31 |
| D690414 | Powered air purifying respirator (PAPR) having control panel | Nathan A. Abel, Sean R. Kilmer, James E. Steffen | 2013-09-24 |
| D684536 | Small battery pack for powered air purifying respirator | Nathan A. Abel | 2013-06-18 |
| D676527 | Unidirectional valve | Thomas J. Xue, Michael K. Domroese, Philip G. Martin, Nathan A. Abel | 2013-02-19 |
| 6575165 | Apparatus and method for breathing apparatus component coupling | David Cook, Raymond Odell, Ian Thomas Petherbridge, Pierre Legare, Robert P. Lapointe +4 more | 2003-06-10 |